Should we all be so lucky to experience such a phenomenon!
Thanks for sharing Snickers!

Yes, it was quite an experience! I wanted to see it again, and worked at that place for several more years, and even though I watched for the shadow, I never did see it again. What I hate the most, is, whenever something like that happens, there is never anyone else around to share it with. I would have liked to find out if it was visible to anyone else, but there was no one around at the moment to ask.

Don't tell me that I didn't see what I saw, or didn't hear what I heard.......Snickers

The 'Shadow People' I've seen run the gamut from barely self-aware lifeforms/entities to very intelligent 'cloaked' beings who have the ability to conceal themselves or appear as they wish (and who, though they may totally look the part to a witness, I wouldn't categorize as 'Shadow People').

In most cases, when someone really sees a 'shadow person' they're seeing an intelligent entity which has no physical form (and is not to be confused with a ghost/spirit). Some are barely self-aware and not that directed in their actions, while others are both very intelligent and purposeful in their behavior. They come in all shapes and sizes. They may just be a blob or cloud thingy, or they may have a vaguely humanoid form or even a clearly defined silhouette that makes you think you're seeing an actual person (you can make out clothing, like a hat or jacket etc).

In other cases, 'shadow people' are more than meets the eye and their true forms often remain hidden to the observer...

For instance, sometimes the shadow or dark figure a person sees is actually just the archetypal or interpretational 'stand-in' the person's mind creates (a real-time 'censoring'/editing their mind performs) to shield them from seeing something traumatic or something 'impossible'. It's a subconscious self defense mechanism to prevent someone from seeing something that would essentially break their mind, and so the dark figure or 'shadow person' someone sees in this case could be anything.

Also, sometimes the shadowy appearance of what someone's looking at is due to that person being 'blocked' from seeing what's in front of them by what's in front of them (what that person's looking at is concealing itself from them, 'cloaking', etc, whatever you wanna say). The witness is being tricked, basically hacked. So again this means that the dark figure or 'shadow person' they're seeing could be anything.

In my experience, the size or height of the dark figure someone sees tends to roughly correlate to the size of what's actually there, but not always. What's there can be way larger or smaller and of a completely different shape altogether.

I have a shadow ghost in my home, actually two of them. One is in my cellar and the other seems to camp out on my porch. They've never tried to harm me, they just seem to like watching. I've yelled at the one on the porch, on more than one occasion, but he just ignores my yelling and just keeps on staring. They've been around for many years and I've learned to live with them.